Rinse-wax formulation

ABSTRACT

Rinse-wax formulation suitable for incorporation into rinse waters during the laundering of cars and automobiles, comprising a cationic surfactant, a mineral oil, a non-alkalimetal soap and water, wherein the mineral oil constitutes a mixture of paraffinic and aromatic/naphtenic material.

United States Patent [191 Syrovatka et al.

[ 51 May 13, 1975 1 RINSE-WAX FORMULATION [75] Inventors: RudolfSyrovatka; Kurt Hofer, both of Vienna, Austria [73] Assignee: LeverBrothers Company, New

York, NY.

[22] Filed: Apr. 9, 1973 [21] Appl. No.: 349,165

[30] Foreign Application Priority Data Apr. 11, 1972 United Kingdom16591/72 [52] US. Cl. 106/8; 106/11; 106/267 [51] Int. Cl. C08h 9/00;C09d l/14 [58] Field of Search 106/8, 247, 285, 243;

[56] References Cited UNITED STATES PATENTS 2,765,255 10/1956 Swarbrick252/312 2,956,971 lO/l960 Lam 106/243 3,222,201 12/1965 Boyle 252/3123,497,365 2/1970 Atherton 106/8 OTHER PUBLICATIONS The ChemicalDictionary, p. 107, 1961.

Primary Examiner-Theodore Morris Attorney, Agent, or Firm-James J.Farrell, Es'q.; Melvin H. Kurtz, Esq.; Arnold Grant, Esq.

[57] ABSTRACT 5 Claims, No Drawings RINSE-WAX FORMULATION BACKGROUND OFTHE INVENTION 1. Field of the Invention This invention relates to arinsing formulation for treating cleaned surfaces. More particularly itrelates to a so-called rinse-wax formulation for rinsing previouslycleaned cars and automobiles.

Automobiles and the like are generally washed and cleaned with alkalinebuilt detergents or anionic detergents. After application of thedetergent the automobile finish is rinsed and dried in the conventionalmanner, i.e., with a cloth or by means of an air blast. A rinsingformulation is generally added to the last rinsing water to facilitatethe rinsing and drying of the cleaned surfaces and provide a deposit ofa waterrepellent film on the treated surface.

2. Description of the Prior Art A rinsing formulation comprising anoil-in-water emulsion containing a cationic surfactant, a mineral oiland water is known from US. Pat. No. 3,222,213. In U.S. Pat. No.3,497,365 the addition of wax and/or silicones is suggested to effect anadditional protective film.

A serious drawback of using these additives in rinse formulations isthat these additives tend to stick and form a very annoying layer ontothe windshield and windows of cars and automobiles, obscuring thedrivers view.

SUMMARY OF THE INVENTION It is an object of the present invention toprovide a rinse-wax formulation with an improved hydrophobing effect,without having the above drawback.

It is another object of this invention to provide a rinse-waxformulation, which provides a stable hydrophobic film-finish onto carsand automobiles, rinsed therewith.

Still another object of this invention is to provide a clear liquidrinse-wax formulation which has satisfactory cold-stability.

Accordingly, the present invention provides an improved rinse-waxformulation, which comprises essentially a cationic surfactant, a metalsoap, a mineral oil, and water.

DESCRIPTION OF THE INVENTION It has been found that an improvedrinse-wax formulation suitable for incorporation into rinse-watersduring the laundering of cars and automobiles, comprising a cationicsurfactant, a mineral oil and water, can be prepared by the addition oflow levels of a nonalkalimetal soap of long chain fatty acids incombination with a mixed paraffinic and aromatic/naphthenic mineral oil.

Accordingly the rinse-wax formulation of the present invention comprisesa cationic surfactant, a mineral oil constituting a mixture ofparaffinic and aromatic/naphthenic material. a non-alkalimetal soap oflong chain fatty acids, and water.

The cationic surfactants which can be used in the formulation of theinvention are known and generally will be nitrogen-containing compoundswhich are reaction products of long-chain fatty acids containing from 8to 22 carbon atoms with alkylene polyamines, alkylol amines or ammonia;the condensation products of a primary fatty amine containing from 8 to22 carbon atoms with alkylene oxide, such as ethylene oxide or otheractive epoxides, such as propylene oxide and the like; and thequaternary ammonium salts of fatty amines having at least one alkylsubstituent containing from 8 to 22 carbon atoms such as fatty amineacetates, fatty amine chlorides, fatty amine bromides and the like.

Typical illustrative nitrogen-containing compounds which are thereaction products of long-chain fatty acids with alkylene polyamines arel-(2-amino ethyl)- 2-heptadecenyl-2-imidazoline; l-(2-amino ethyl)-2-heptadecadienyl-2-imidazoline, and the like.

Typical reaction products of long-chain fatty acids with alkylol aminesare l-(2-hydroxyethyl)-2- heptadecenyl-2-imidazoline;l-(2-hydroxyethyl)-2- heptadecadienyl-Z-imidazoline, and the like.

Typical reaction products of long-chain fatty acids with ammonia areoctadecylamide, hexadecylamide, docosylamide, octylamide, and the like.

Typical condensation products of a primary fatty amine with an alkyleneoxide or the like are the N,N-di- (monoand polyalkylene-oxyalkylol)-octadecylamines, the N,N-di-(monoandpolyalkyleneoxyalkylol)-heptadecylamines, the N,N-di(mono-andpolyalkylene-oxyalkylol)-hexadecylamines, the N,N- di-(monoandpolyalkylene-oxyalkylol)- tetradecylamines, the N,N-di(monoandpolyalkyleneoxyalkylol)-dodecylamines, and the like.

Typical quaternary ammonium salts are the coconut oil quaternary amineacetates, octadecyltrimethylammonium chloride,octadecylbenzyldimethylammonium chloride, hexadecyldimethylethylammoniumbromide, dodecyl trimethylammonium chloride, and the like.

The preferred cationic surfactants for the instant for mulations are thequaternary ammonium salts of fatty amines having at least one alkylsubstituent containing from 8 to 22 carbon atoms. Particularly preferredare the coconut fatty amine acetates.

By the term metal soap as used herein is meant the non-alkali metalsalts of long-chain fatty acids having about 12-22 carbon atoms. It hasbeen established that by the presence of small amounts of metal soap theproperties of rinse-wax formulations are greatly improved. Suitablemetal soaps for the formulation of the invention are the fatty acidsalts of metals of Group IIA, HE and IIIA of the periodic system, suchas the Mg-, Ca-, Sr-, Ba-, Zn-, Cdand Al-soaps, of which the stearatesare particularly preferred. Metal stearates are for example derived fromhardened tallow fatty acids, and technical or pure grade stearic acid,comprising a mixture of predominantly C -C saturated fatty acids.

The mineral oils suitable for the formulation of the invention are themixed paraffinic and aromatic/naphthenic mineral oils. It is essentialthat the mineral oil used in the invention contains a certain proportionof aromatic/naphthenic constituents, to get the benefit'of the effectfrom the metal soap constituent in the formulation. Surprisingly it hasbeen observed that either pure paraffine mineral oil or purearomatic/naphthenic mineral oil is not suitable for the purpose of theinvention, since compositions with or without metal soaps comprisingthese oils would have substantially equal performance. The combinedeffect of mixed oils and metal soap is quite surprising. Preferredmineral oils are those having an aromatic/naphthenic content within therange of from about 5-70% by weight, more preferably from 15-50%. Inpractice the mineral oil employed will have a boiling point of at least100C, since lower boiling oils would be too volatile.

Preferably the formulation contains a solubilizing nonionic substance.Whereas this latter is not essential to the technical performance of theproduct, it does promote the solubilization of the mineral oil and otheressential ingredients in the aqueous medium, thus making the formulationmore manageable and more suitable for use.

The rinse-wax formulation according to the invention therefore comprisesan effective amount of cationic surfactant, a non-alkali metal soapderived from long chain fatty acids, a mineral oil constituting amixture of paraffinic and aromatic/naphthenic material and water. In onepreferred embodiment of the invention a substantially clear liquidrinse-wax formulation is provided, containing a solubilizing nonionicsubstance.

The term solubilizing nonionic substance is used herein to indicate anon-detergent organic nonionic material having solubilizing properties.Specifically contemplated within this definition are the lowerethyloxylated nonionics containing 2-4 ethylene oxide groups permolecule; the glycols and their derivatives, such as ethylene glycol,diethylene glycol, butyldiglycol, and the like; the low-molecular weightmonohydroxy alcohols, such as butanol and isobutanol, and mixturesthereof.

In a rinse-wax formulation of the invention, the cationic surfactant maybe present in amounts in the range of l20% by weight, the preferredrange being from 210% by weight. The metal soap is present in theformulation usually in an amount in the range of 0.0 l2.0% by weight andpreferably in an amount from about 0.050.75% by weight. The mineral oilas hereinbefore defined is present usually in an amount of at least 10%.by weight up to about 30% by weight of the formulation. Preferably theformulation of the invention contains aromatic/naphthenic oil materialwithin from 0.5-6.0% by weight, based on the total composition prior todilution.

The amount of solubilizing nonionics preferably employed in theformulation is about 515% by weight.

Other ingredients may also be added in the formulation, if desirable,such as for example low-foaming nonionic surfactants, perfume, colouringsubstances, etc.

The rinse-wax formulation according to the invention is applied to thecars in the conventional manner by diluting it with water in a ratio ofthe order of about 111,000 and spraying it onto the cars after they havebeen washed and rinsed, or while they are being rinsed.

Surprisingly rinse-wax compositions formulated as herein describedaccording to the invention show remarkably better properties andperformance on use as compared with the conventional compositions,particularly with respect to water-breakand hydrophobing effect, andfilm stability.

Whereas some conventional rinse-wax formulations are relativelysensitive to the hardness of the water used for rinsing, the performanceof the formulation of the invention is substantially uneffected whenused in either soft or hard water.

A noticeable improvement in cold-stability has also been observed.

A further improvement is that rinse-wax formulations of the inventionmaintain their effectiveness irrespective of the type of detergents usedin the cleaning and washing stage of the vehicle, i.e., not susceptibleto anionic detergents.

Typical rinse-wax formulations and their properties are illustrated inthe following Examples; which are not to be considered as limitative inany respect.

EXAMPLES I III Formulations I, II and III within the invention comparedwith Formulations A, B and C as regards hydrophobing effect andstability of the hydrophobic film.

the range of from about 0.5-% by weight, preferably 40 The results aretabulated below:

TABLE Ingredients:

Formulation in by weight "Expressed as number of drops of a rinse waxsolution (cone. 2 g/l) from a burette necessary for water break on alacquered surface being wettcd before with a solution of 0.2 g/lsodium-alkylbenzene sulphonatc.

'Expressed in minutes necessary for re-wetting by spraying water onto ahydrophobizcd surface.

*From technical stearic acid.

The above Table shows that formulations 1, 11 and 111 according to theinvention were clearly better than formulations A, B and C which areoutside the scope of the present invention.

The above formulations 1 111 can be diluted with water in a ratio ofabout 1-2 parts of the formulation to about 1,000 parts of water andsprayed on cleaned cars prior to drying.

Similar results were obtained when the coconut fatty amine acetate inthe formulation was replaced by:

1. tallow fatty amine-ethoxylates with 5 moles of ethylene oxide;

2. octadecylamide.

What is claimed is:

1. A rinse-wax formulation suitable for incorporation into rinse watersduring the laundering of cars or automobiles, comprising an aqueousmedium having therein solubilized a cationic surfactant selected fromthe group consisting of reaction products of long-chain fatty acidscontaining from 8-22 carbon atoms with alkylene polyamines,alkylolamines or ammonia, the condensation products of primary fattyamines containing from 8-22 carbon atoms with an alkylene oxide, thequaternary ammonium salts of fatty amines having at least one alkylsubstituent containing from 8-22 carbon atoms; and mixtures thereof; amineral oil having an aromatic material content of from about -70% byweight; and a non-alkalimetal salt of long chain fatty acids having fromabout 12-22 carbon atoms in the chain, selected from the groupconsisting of magne sium, calcium, strontium, barium, zinc, cadmium,aluminum salts and mixtures thereof; said formulation comprisingessentially about l-% by weight of said cationic surfactant, about10-30% by weight of said mineral oil, about 0.0l-2.0% by weight of saidnonalkalimetal soap, and the balance water.

2. A substantially clear liquid rinse-wax formulation suitable forincorporation into rinse waters during the laundering of cars orautomobiles, comprising an aqueous medium having therein solubilized acationic surfactant selected from the group consisting of reactionproducts of long-chain fatty acids containing from 8-22 carbon atomswith alkylene polyamines, alkylolamines or ammonia, the condensationproducts of primary fatty amines containing from 8-22 carbon atoms withan alkylene oxide, the quaternary ammonium salts of fatty amines havingat least one alkyl substituent containing from 8-22 carbon atoms; andmixtures thereof; said formulation comprising essentially about 1-20% byweight of said cationic surfactant, about 10-30% by weight of saidmineral oil, about 0.0l2.0% by weight of said non-alkali metal soap,about 5-15% by weight of a solubilizing nonionic substance, selectedfrom the group consisting of non-detersive lower ethoxylated nonioniccompounds having from 2-4 ethylene oxide groups per molecule, glycolsand their derivatives selected from the group consisting of ethyleneglycol, diethylene glycol and butyldiglycol, butanols and mixturesthereof, and the balance water.

3. A rinse-wax formulation according to claim 1, which contains about05-10% by weight of aromatic/- naphthenic oil based on the totalcomposition.

4. A rinse-wax formulation according to claim 1, in which the non-alkalimetal soap is present in an amount from about 0.05-0.75% by weight ofthe total formulation. i

5. A rinse-wax formulation according to claim 1, in which the cationicsurfactant is a coconut fatty amine acetate.

1. A RINSE-WAX FORMULATION SUITABLE FOR IMCORPORATION INTO RINSE WATERSDURING THE LAUNDERING OF CARS OR ASUTOMOBILES, COMPRISING AN AQUEOUSMEDIUM HAVING THEREIN SOLUBILIZED A CATIONIC SURFACTANT SELECTED FROMTHE GROUP CONSISTING OF REACTION PRODUCTS OF LONG-CHAIN FETTY ACIDSCONTAINING FROM 8-22 CARBON ATOMS WITH ALKYLENE POLYAMINES,ALKYLOLAMINES OR AMMONIA, THE CONDENSATION PRODUCTS OF PRIMARY FATTYAMINES CONTAINING FROM 8-22 CARBON ATOMS WITH AN ALKYLENE OXIDE, THEQUATERNARY AMMONIUM SALTS OF FATTY AMINES HAVING AT LEAST ONE ALKYLSUBSTITUENT CONTAINING FROM 8-22 CARBON ATOMS; AND MIXTURES THEREOF; AMINERAL OIL HAVING AN AROMATIC MATERIAL CONTENT OF FROM ABOUT 15-70% BYWEIGHT; AND A NONALKALIMETAL SALT OF LONG CHAIN FATTY ACIDS HAVING FROMABOUT 12-22 CARBON ATOMS IN THE CHAIN, SELECTED FROM THE GROUPCONSISTING OF MAGNESIUM, CALCIUM, STRONTIUM, BARIUM, ZINC, CADMIIM,ALUMINUM SALTS AND MIXTURES THEREOF; SAID MINERAL TION COMPRISINGESSENTIALLY ABOUT 1-20% BY WEIGHT OF SAID CATIONIC SURFACTANT, ABOUT10-30% BY WEIGHT OF SAID MINERAL OIL, ABOUT 0.01-2.0% BY WEIGHT OF SAIDNON-ALKALIMETAL SOAP, AND THE BALANCE WATER.
 2. A substantially clearliquid rinse-wax formulation suitable for incorporation into rinsewaters during the laundering of cars or automobiles, comprising anaqueous medium having therein solubilized a cationic surfactant selectedfrom the group consisting of reaction products of long-chain fatty acidscontaining from 8-22 carbon atoms with alkylene polyamines,alkylolamines or ammonia, the condensation products of primary fattyamines containing from 8-22 carbon atoms with an alkylene oxide, thequaternary ammonium salts of fatty amines having at least one alkylsubstituent containing from 8-22 carbon atoms; and mixtures thereof;said formulation comprising essentially about 1-20% by weight of saidcationic surfactant, about 10-30% by weight of said mineral oil, about0.01-2.0% by weight of said non-alkali metal soap, about 5-15% by weightof a solubilizing nonionic substance, selected from the group consistingof non-detersive lower ethoxylated nonionic compounds having from 2-4ethylene oxide groups per molecule, glycols and their derivativesselected from the group consisting of ethylene glycol, diethylene glycoland butyldiglycol, butanols and mixtures thereof, and the balance water.3. A rinse-wax formulation according to claim 1, which contains about0.5-10% by weight of aromatic/naphthenic oil based on the totalcomposition.
 4. A rinse-wax formulation according to claim 1, in whichthe non-alkali metal soap is present in an amount from about 0.05-0.75%by weight of the total formulation.
 5. A rinse-wax formulation accordingto claim 1, in which the cationic surfactant is a coconut fatty amineacetate.